2921157 has 8 divisors (see below), whose sum is σ = 4327680. Its totient is φ = 1947420.

The previous prime is 2921147. The next prime is 2921173. The reversal of 2921157 is 7511292.

It is not a de Polignac number, because 2921157 - 2⁷ = 2921029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 108191 = 2921157 / (2 + 9 + 2 + 1 + 1 + 5 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 2921157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2921137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54069 + ... + 54122.

It is an arithmetic number, because the mean of its divisors is an integer number (540960).

2^2921157 is an apocalyptic number.

2921157 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2921157 is a deficient number, since it is larger than the sum of its proper divisors (1406523).

2921157 is a wasteful number, since it uses less digits than its factorization.

2921157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108200 (or 108194 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 2921157 is about 1709.1392570531. The cubic root of 2921157 is about 142.9502655221.

The spelling of 2921157 in words is "two million, nine hundred twenty-one thousand, one hundred fifty-seven".